Add Cruft to keep in sync with plugin template

.cruft.json

@@ -0,0 +1,27 @@
+{
+  "template": "https://github.com/getpelican/cookiecutter-pelican-plugin",
+  "commit": "4e2289f3dce8517c07af48b905d557ea6500b465",
+  "checkout": null,
+  "context": {
+    "cookiecutter": {
+      "plugin_name": "Sitemap",
+      "repo_name": "sitemap",
+      "package_name": "sitemap",
+      "distribution_name": "pelican-sitemap",
+      "version": "1.1.0",
+      "description": "Pelican plugin to generate sitemap in plain-text or XML format",
+      "authors": "{name = \"Pelican Dev Team\", email = \"[email protected]\"}",
+      "keywords": "\"pelican\", \"plugin\", \"sitemap\"",
+      "readme": "README.md",
+      "contributing": "CONTRIBUTING.md",
+      "license": "GNU Affero General Public License v3|AGPL-3.0",
+      "repo_url": "https://github.com/pelican-plugins/sitemap",
+      "dev_status": "5 - Production/Stable",
+      "tests_exist": true,
+      "python_version": "~=3.9",
+      "pelican_version": ">=4.5",
+      "_template": "https://github.com/getpelican/cookiecutter-pelican-plugin"
+    }
+  },
+  "directory": null
+}

tasks.py

@@ -18,9 +18,10 @@
 BIN_DIR = "bin" if os.name != "nt" else "Scripts"
 VENV_BIN = Path(VENV) / Path(BIN_DIR)
 
-TOOLS = ("pdm", "pre-commit")
+TOOLS = ("cruft", "pdm", "pre-commit")
 PDM = which("pdm") if which("pdm") else (VENV_BIN / "pdm")
 CMD_PREFIX = f"{VENV_BIN}/" if ACTIVE_VENV else f"{PDM} run "
+CRUFT = which("cruft") if which("cruft") else f"{CMD_PREFIX}cruft"
 PRECOMMIT = which("pre-commit") if which("pre-commit") else f"{CMD_PREFIX}pre-commit"
 PTY = os.name != "nt"
 
@@ -81,6 +82,17 @@ def precommit(c):
     c.run(f"{PRECOMMIT} install")
 
 
+@task
+def update(c, check=False):
+    """Apply upstream plugin template changes to this project."""
+    if check:
+        logger.info("** Checking for upstream template changes **")
+        c.run(f"{CRUFT} check", pty=PTY)
+    else:
+        logger.info("** Updating project from upstream template **")
+        c.run(f"{CRUFT} update", pty=PTY)
+
+
 @task
 def setup(c):
     """Set up the development environment."""